What is the air quality in Ōmachi today?

The current Air Quality Index (AQI) in Ōmachi is 42 (Good). PM2.5 concentration is 10.1 µg/m³.

What is the temperature in Ōmachi right now?

The current temperature in Ōmachi is 9.2°C (feels like 7.3°C). Humidity is 86.7% and wind speed is 12.6 km/h.

Is it safe to go outside in Ōmachi?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Ōmachi, Japan

Drizzle

9.2°C · 86.7% humidity

9.2°

Feels 7.3°

Good

Air quality is satisfactory. Enjoy outdoor activities.

1 station

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

43h · 1 stn

View full history →

Ōmachi's air quality is influenced by industrial emissions, vehicle traffic, and regional pollution transport. Winter heating season and spring dust events typically create the most challenging air quality conditions.

86.7%

Humidity

12.6 km/h

Wind SW

1019.6 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

10.1 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Ōmachi?

Temperature & Precipitation

PM2.5 Trend

43h · 1 station

PM2.510.1 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (1 station within 25 km)

10.1

Median

10.1

Average

10.1

Low

10.1

High

PM2.5 µg/m³ · Model: 5.8 · Bias: -4.3

What is the 7-day forecast for Ōmachi?

10-21

9.7° 4.7°

0.25 mm

10-22

14.9° 7.4°

0.5 mm

10-23

13.2° 4.5°

0.31 mm

10-24

11.6° 7.7°

1.13 mm

10-25

11.4° 0.1°

1.56 mm

10-26

9.5° 1.0°

10-27

8.5° 1.2°

0.38 mm

Both models agree Avg diff: 5.4°C

Where are air quality stations near Ōmachi?

Awasa, Chikuma, Nagano, Japan (更埴インターチェンジ千曲市)

23.3 km PM2.5: 10.1 µg/m³

What cities are near Ōmachi?

28 Hotaka 42 Chikuma 29 Toyoshina 30 Azumino 42 Sakaki 29 Matsumoto 42 Nagano 55 Ueda 75 Kamimaruko 38 Suzaka

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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-10-21T06:02 UTC.